What we call shock absorbers are really dampers. The springs in a vehicle's suspension absorb bumps and other road shocks by compressing, and the shock absorbers control the amount of bouncing created when the springs rebound.
Several warning signs can tell you when shock absorbers need replacing, such as your car bottoms out over railroad tracks, speed bumps or dips in the road or keeps bouncing well after the fact. Other signs are unusual noises over bumps, excessive body lean in turns or that the front end of the car dives sharply in hard braking. Because shocks wear out gradually, you might get used to a looser, bouncier ride, much like you get used to longer stopping distances as brake pads wear out.
One way to test shocks is to push down hard on each corner of a vehicle. If you are driving vehicle and vehicle continues to bounce then it is compulsory to check the shocks and struts of your vehicle. Car crash also damages the shocks of your car.